I'm preparing to remove my freshwater tank from my 86 Limited 34'. I too have grey poly plumbing leak above the tank. The lines from from the street side bath, under the floor but on top of the tank, and then back up to the curb side galley.
Any particular watch outs on dropping the pan and removing the tank? I can remove the pump inlet, I haven't figured out how to remove the tank fill hose or tank vent line, and I had already replaced the fresh water drain valve on the bottom of the tank.
Your experience welcome...